TH140-28
Installation and User Guide
Electronic Programmable Thermostat
n Installation
1.1 Guidelines
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN POWER PANEL TO AVOID ELECTRICAL SHOCK.
Installation should be carried out by an electrician.
•For a new installation, choose a location about 5 ft. (1.5 m) above the floor.
•The thermostat must be installed facing the heating system and on an inside wall.
•Avoid locations where there are air drafts (top of staircase, air outlet), dead air spots (behind a door), direct sunlight or concealed chimneys or stove pipes.
nLoosen the captive screw holding the faceplate to the mounting plate.
oPull the lower part of the faceplate to remove it from the mounting plate.
pLoosen the screw (captive) holding the wire cover and remove the wire cover.
qPull wires through the hole in the mounting plate and secure the mounting plate to the wall (or onto an electrical box for line voltage wiring) using the enclosed wall anchors and screws.
rWire the thermostat to the heating system (see section 1.2) and, if necessary, connect the remote input (see section 1.3).
s Once wiring is complete, re-install the wire cover.
tUse the switches located at the back of the faceplate to configure your thermostat (see section 1.4) according to your application.
u Install the batteries (see section 1.5).
v Mount the faceplate on the mounting plate and tighten the screw.
1.2 Thermostat Wiring
NORTH AMERICA
LOW VOLTAGE < 30 V: no polarity
120/240 V
Relay
Relay
LINE VOLTAGE 120 to 240 VAC
Connection to a circulator through a 24 V relay
24 V transformer
Connection to the thermostat terminals of a furnace
Furnace
Must be installed onto a certified electrical box.
2 A maximum load |
Power supply |
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120/240 V |
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Connection to a |
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circulator (pump) |
Load |
of a water heating |
Provided wires |
system |
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EUROPE |
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For a 2-wire connection: no polarity |
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240 V |
Direct wiring to |
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the circulator |
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Relay |
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Connection to the |
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thermostat terminals |
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Furnace |
of a furnace |
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For a 3-wire connection: observe the polarity
Wiring to a
240 V power-operated mixing control valve
TH140-28 |
400-140-000-C |
2008-01-15 |
1/4 |
1.3 Remote Input Wiring
The TH140 is equipped with a remote input which allows connection of a telephone controller (optional Aube CT240), a home automation system or any other remote control system. When a signal is received through this input, the TH140 will automatically switch from normal operating mode to Vacation mode, or vice versa when the signal is removed.
1.3.1 Connection to the CT240
Connect CT240 terminals A and C to TH140 terminals X and C. You must respect the polarity.
For details on operating the telephone controller, refer to the instruction manual.
1.3.2 Connection to a home automation system
Connect the TH140 to the home auto- |
Home automation system |
mation system as displayed in the wir- |
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1.4 Configure the Thermostat
The switches are located on the back of the faceplate. Default settings are highlighted.
Switch |
Description |
UP |
DOWN |
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1 & 2 |
Cycles (proportional) |
15 min (see 1.4.1) |
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Span (conventional) |
0.5°C (0.9°F) (see 1.4.2) |
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3 |
Clock display |
12H |
24H |
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4 |
Temperature display 1 |
°F |
°C |
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5 |
Temperature control mode |
Proportional |
Conventional |
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(see 1.4.1) |
(see 1.4.2) |
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6 |
Pump protection 2 |
Deactivate |
Activate |
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1.If you change from °C to °F (or vice versa), you will need to reprogram your Comfort, Economy and Vacation settings.
2.For hot water installations, it is recommended to enable this option to activate the pump for one minute every 24 hours to prevent pump seizure.
1.4.1 Proportional Adaptive Mode (switch #5)
This mode analyzes previous cycles to define the the next duty cycle. This control mode guarantees optimal temperature control based on the system’s capacity. To extend the life of the system, a minimum On/Off time of 10% of the cycle has been implemented. For example with a 15-minute cycle, the system would not start or stop for less than 1.5 minutes.
Ideal for:
•Radiant or convection electrical heating system
•Circulator control in a hot water system
•Electrical hot-air furnace
•Conventional gas or fuel hot-air furnace
Not recommended for:
•Gas or fuel furnace or boiler with a wall chimney having a 30-sec- ond or higher combustion gas purging cycle. To figure out the gas purging cycle of your system, count the time between the heating command sent by the thermostat and the moment when the burner actually goes on.
•Multi-zone systems, where several thermostats command a single heating unit.
Note: In these last two cases, conventional mode with anticipation is recommended.
Heating Cycle Selection (switches #1 and #2)
Select the cycle using switches #1 and #2. Short cycles help eliminate temperature variations, thus increasing user comfort. Since shorter cycles can lead to premature system wear, it is important to select the temperature control cycles appropriate to your heating system. In general, the bigger your heating unit is, the longer the cycles should be.
Cycles |
EUROPE |
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5 minutes |
Not recommended for |
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furnaces |
central units |
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10 minutes |
Gas or electric |
Radiant or convection |
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wall furnace |
electric heating |
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Fuel or gas floor |
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15 minutes |
furnace, forced air |
Central heating |
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heating |
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20 minutes |
Commercial unit |
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1.4.2 Conventional mode with anticipation (switch #5)
This mode is compatible with all heating systems.
Programmable Span Selection (switches #1 and #2)
Select the span using switches #1 and #2. The default temperature span is 0.5°C (0.9°F). For example, if the temperature setpoint is 20°C (68°F), the heating system will turn on at 19.5°C (67.1°F) and turn off at 20.5°C (68.9°F).
Span |
Hot Water Heating |
Forced Air Heating |
Position |
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0,3°C |
Not recommended for |
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(0,5°F) |
furnaces |
central units |
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0,4°C |
Gas or electric |
Radiant or convection |
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(0,7°F) |
wall furnace |
electric heating 1 |
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0,5°C |
Fuel or gas floor |
Central heating |
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(0,9°F) |
furnace |
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0,6°C |
Commercial unit |
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(1,1°F) |
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1.240 volt heating with relay (baseboard, convector, radiant ceiling, etc.)
TH140-28 |
400-140-000-C |
2008-01-15 |
2/4 |
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